During December 2024, Harald Alvestrand contributed to the web-platform-tests/wpt-metadata repository by developing new metadata entries for WebRTC H.264 constraints test results. He focused on expanding the META.yml file under webrtc/protocol to document test outcomes for various H.264 video profiles and levels within Chrome, enabling more deterministic validation of video constraints. Using YAML for metadata management and leveraging web platform testing practices, Harald’s work improved traceability and facilitated continuous integration verification. He also documented the metadata workflow, supporting future extensions and cross-repository governance. The contribution demonstrated depth in metadata structuring and addressed the need for robust test result documentation.